Power operated cutoff shear mechanism adjustable as a unit along a frame



Feb. 7, 1961 L. A. KINGSLEY 2,970,504

POWER OPERATED CUTOFF SHEAR MECHANISM v ADJUSTABLE AS A UNIT ALONG A FRAME Filed 001',- 26, 1956 2 Sheets-Sheet 1 FIG. 1.

H Z a INVENTOR.

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POWER OPERATED CUTOFF SHEAR MECHANISM ADJUSTABLE AS A UNIT ALONG A FRAME Lewis Anthony Kingsley, Beverly Hills, Calif. (/o Kingsley Stamping Machine Co., 850Cahuenga Blvd., Hollywood 38, Calif.) 1

Filed Oct. 26, 1956, Ser. No. 618,492

Claims. (Cl. 83-467) This invention relates to ashearing mechanism for use on machines for marking and cutting of insulated wire or tubing.

It is an object of this invention to provide a device for attachment to and operation with awire. marking machine for cutting off sections of wire or tubing marked by the machine in desired lengths. V r

It is still a further object of this invention to provide a shearing mechanism wherein the length of wire or tubing can be readily varied and wherein different size" wire or tubing can be accommodated.

It is still a further object of this invention to provide a device which produces a clean and uniformcut.

Other objects and advantages will be readily apparent from the following description? In the drawings: j Figure 1 is a top plan view ofthe=device withlcerta'in parts broken away. 'Figure 2 is a side elevation of the device. t Figure 3 is a view in cross .sectiontaken along line 3+3 ofFigure l.

Figure 4 is a view in cross section taken 4-4 of Figure 3.

Figure 5 is a perspective view of the guide. bushing. As previously set forth this device operates in conjunction with a wiremarking machine and is adapted to receive wire or tubing after the same has been along line stamped as by a machine such as described in my United StatesPatent No. 2,725,817. g

I "The end of the wire .or tubing to besheared passes through a guidebushing 12 ,andzis supportedthereby. The bushing has an internal .bore 14 adapted to' snugly fit:.the, wire 10 while the same is fed through the bushing, however, sufliciently loosely to prevent binding. ..The guide bushing is inserted into a suitable bore in the shear body 16 with the shoulder 18 formed on a radial flange on the leading edge of the bushing 12 flush against the external surface of the body 16, which locates the cutting edge on the other end of the bushing relative to the path of movement of the knife blade, as described hereinafter. The external radial flange on the leading edge of the bushing 12 also provides a means for rotating the bushing relative to the body 16 to position a diflerent portion of the cutting edge of its bore relative to the path of movement of the knife blade. The bushing is provided with an external annular groove 20 which receives a set screw 22 mounted in body 16 locking the bushing in position in the body while a hex nut 24 locks the set screw. The smaller end 26 of the guide bushing is ground to form a long lasting cutting edge on bore 14 against movement of the knife blade 28.

The above construction permits the use of precision interchangeable bushings to accommodate various sizes of wire or tubing, and facilitates ready replacement without requiring adjustment of each bushing to the alignment of the knife blade. It also permits the bushing 12 who rotated relative to the body 16, when required, to present a diflEerent portion of the cutting edge of the bore 2,970,504 Patented Feb. 7, 1961 of the bushing relative to the path of movement of the knife blade as described above.

The blade 28 is mounted upon an arm 30 of a solenoid 32 by a knife holding screw 34. The body 16 is slotted as at 36 to receive the screw 34 and has a bore 38 therein which houses a spring 40 bearing against the screw 34.

The solenoid is energized by conductor 42 from a suitable source of electricity and is controlled by a suitable switch (not shown). When energizedthe solenoid arm 30 and hence the knife 28 are urged toward the guide bushing 12 with the cutting edges of the knife and bushing severing a section of wire or tubing. The severed portion may be removed by gravity or otherwise. When the solenoid is deenergized the spring 40 retracts the knife 28, permitting more wire or tubing 10 to be fed through the guide bushing 12 upon discharge from the stamping machine.

The path of knife 28 is controlled by a pair of gibs 44. The gibs are formed of a gib body 46 and a gib plate 48 bolted thereto which form a pair of opposed channels in which the knife reciprocates, insuring an even and uniform cutting action. This uniformity of cutting is extremely important and diflicult to attain when dealing with a flexible vinyl sleeve.

The position of the shearing mechanism with respect to the stamping machine is controlled by1a block 50. secured by a screw 52 to the underside of the body 16. This block 50 fits into a channel 54in a mounting bracket 56 which in turn may be secured in any suitable manner to the base 58 of a stamping machine 60. Thus, as the block 50 slides in channel v54, the shearing mechanism may be adjustably moved outwardly or vice versa from the stamping machine along the path of discharge of wire or tubing from the stamping or marking machine.

One wall of the bracket 56'is slotted to receive a screw 62 which is carried .by the block 50 and when tightened,

locks the block in position. An L-shaped stop 64 is in serted into one of the holes 66 in the upper edge of the bracket 56 to limit movement of the shearing mechanism. This stop can be inserted in any one of the holes 66 depending upon the desired length of tubing or wire that is to be severed.

. A gauge 68 also has an extremity held in the block 50 by set screws 70. This gauge passesthrough an aper the guide bushing 12. The gauge has a series of spaced annular grooves 74 each adapted to selectively receive the tip of a set screw 76 on the stop 72, locking the stop at the desired distance from the knife 28., A hex nut 78 serves to lock the set screw.

In operation, as the stamping machine stamps on the wire or tubing the same is discharged therefrom. The shearing mechanism is fixed at the desired distance from the marking machine by dropping stop 64 into the desired hole 66, moving the shearing mechanism body 16 into contact therewith and tightening the screw 62.

The wire stop 72 is then positioned on gauge 68 the desired distance from knife 28 and set screw 76 is tightened. Thus when the solenoid is energized, the knife 28 crosses the ground surface 26 of the bushing 12, sevets a. section of the tubing or wire 10, which is removed. More tubing or wire is then fed from the marking machine 60 into abutment with the stop 72 preparatory to the next shearing.

It is frequently desirable to synchronize the action of the shearing mechanism to the stamping process which may be done in any manner well known to those skilled in the art, as for example, using a switch to control the solenoid which switch is closed during each stamping operation.

particularly While what hereinbefore has been described is the preferred embodiment of this invention it is readily apparent that alterations and modifications can be resorted to without departing from the scope of this invention and such alterations and modifications are intended to be included within the scope of the appended claims.

I claim:

l. Ashearing mechanism for wire or tubing comprising: a body having a transverse bore, a guide bushing inserted into said bore through which wire or tubing to be severed is fed, a knife reciprocable within said body across one end of said guide bushing, power means supported by said body and connected with said knife for reciprocating said knife, means forming a channel, said channel forming means including a mounting bracket for attaching said shearing mechanism to the base of a wire or tubing stamping machine, the axis of said bushing being disposed parallel with and directly above the longitudinal axis of said channel, and a block on said body secured to said body, said block fitting within said channel, thereby confining movement of said body and said guide bushing along the path of said channel.

, 2. A shearing mechanism for wire or tubing as defined in claim 1, including a tubing stop, said tubing stop comprising a gauge, disposed within said channel, attached and supported by said block, and a vertically disposed stop member adjustably connected with said gauge and having a portion aligned with the axis of said bushing, and in which the means forming the channel includes spaced holes adjacent the channel, and a removable stop pin, adapted to be selectively positioned in any desired hole, having a portion extending into the path of movement of the body to serve as a stop therefor.

' 3. Ashearing mechanism for Wire or tubing as defined in claim-1, in which is the guide bushing being removably and rotatably mounted in said bore; one end of said guide bushing having a cutting edge about the end of the bore in the guide bushing lying in a plane normal to the axis of the latter bore; said cutting knife blade cooperating with said cutting edge to sever wire or tubing passing through the bore in the guide bushing; said guide bushing including an external annular groove intermediate the ends thereof; and locking means cooperable with said body and said annular groove to retain said guide bushing in-any position to which it is rotated,'whereby the guide bushing may be replaced by other guide bushings having bores to accommodate various sizes of wire or tubing, and whereby the guide bushing may be rotated to position a different portion of the edge to cooperate with the movement of the knife blade.

4. A shearing mechanism for wire or tubing as defined in claim 3, in which the end opposite the cutting end of the guide bushing includes a radial fiange,-the inner to properly locate the cutting edge relative to the path of movement of the knife blade, said radial flange also providing means externally of said body for rotating said bushing relative to said body to position a different portion of the cutting edge of its bore relative to said path of movement of said knife blade.

5. A shearing mechanism for wire or tubing comprising: a bore, a guide bushing inserted into said bore through which wire or tubing to be severed is fed, a knife reciprocable within said body across one end of said guide bushing, power means supported by said body and connected with said knife for reciprocating said knife, means forming a channel having two side walls and a bottom wall, one of said walls including a longitudinal slot, said channel forming means including a mounting bracket for attaching said shearing mechanism to the base of a wire or tubing machine, the axis of said bushing being disposed parallel with and directly above the longitudinal axis of said channel, a block on said body secured to said body, said block fitting within said channel, said block carrying guide means cooperating with said slot, thereby confining movement of said body and bushing along a path parallel with the longitudinal axis of said channel, said guide means including means and means on said block for locking said block in said channel.

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